PS Magazine - TB 43-PS-665
PS, The Preventative Maintenance Monthly
ISSUE 665
APRIL 2008
38
PS 665
APR 08
39
PS 665
APR 08
M
echanics, inspect your Kiowa Warrior’s transmission and freewheel oil system
Flter, NSN 4730-01-214-1465, to make sure you have the right conFguration.
Examine the Flter unit screen hole pattern. If it doesn’t have at least 65 holes,
replace it with the correct Flter.
The Flter unit will not affect the normal operation of your bird, but the AMCOM
headshed wants the incorrect Flters replaced at the unit’s earliest convenience. They
put out a maintenance information message (MIM) OH-58D-MIM-2006-011 as a
heads-up to units that the part was incorrectly manufactured.
To receive the correct Flter, order it through normal supply channels.
If the oil Flter unit on your bird has a minimum of 65 holes, then your aircraft is
good to go. You can reference the part in EM-0256, IETM 1-1520-248-23P, ±ig 89,
Item 103.
C
rew chiefs, eyeball your Kiowa Warrior’s tail rotor shaft cover hinge pins. Tail
boom vibrations during flight will slowly work loose the pins.
Loose hinge pins can
slide back into the tail
rotor gearbox area. That’s
like throwing a wrench
into a fan. If the pins get
caught in the gearbox, it
can shear off pieces of the
pin that become ±OD.
Your flight could come
to an abrupt end if the
tail rotor is damaged by
chewed
pieces
of
the
hinge pin rod.
So keep those slippery hinge pins in place. When you remove and install the tail
rotor drive shaft covers, ask your airframe mechanic to drill a hole using a No. 55
drill bit in the forward and aft end of the hinge pin and hinge like it says in paragraph
2-3-11 of TM 1-1520-248-23. Then add safety wire, NSN 9505-00-293-4208, to
keep the pins from sliding out either side of the hinge.
Fewer than 65
holes? Remove
from service
OH-58D…
Slippery Hinge Pin
Transmission
and
Freewheel Oil Filters
you gotta
check the hole
pattern on my
filter unit.
yep!
your
filter
has 65
holes,
so
you’re
good!
Minimum
of 65 holes
is required
Drill hole in foward and
aft end of hinge half
I’m going
to take
care of
your hinge
pin asap!
good!
it’s
a slippery
little thing!
OH-58D…
665.38-39.indd
1-2
3/4/08
4:23:50 PM
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